Method and device for resource allocation of backhaul link control channel information

ABSTRACT

The present invention discloses a method and device for resource allocation of backhaul link control channel information. Upon application of a technical solution proposed by embodiments of this invention and based on the condition of introducing DMRS and CSI-RS, make remaining REs which are not occupied by CSI-RS and/or DM-RS in OFDM symbol that contains REs for transmitting CSI-RS and/or DM-RS constitute REG to transmit backhaul link control channel information or abandon them; thus, on the basis of maximizing the reservation of existing LTE system specification, specifying resource allocation scheme of backhaul link control channel information in corresponding physical resource block, giving consideration to both simple specification design and full utilization of resources, and realizing flexible design and allocation in light of the demand of a real system.

CROSS REFERENCE TO RELATED APPLICATIONS:

This application is the U.S. national stage of international patentapplication no. PCT/CN2011/074990 file on May 31, 2011, which claims thepriority to Chinese Patent Application No. 201010218479.8 entitled “AMethod and Device for Resource Allocation of Backhaul Link ControlChannel Information” filed in patent office of the People's Republic ofChina on Jun. 25, 2010, the disclosures of which are incorporated byreference herein.

FIELD OF THE INVENTION

The present invention relates to the field of communication technology,in particular to a method and device for resource allocation of backhaullink control channel information.

BACKGROUND OF THE INVENTION

The network structure diagram of LTE-A (Long Term Evolution Advanced)system is shown in FIG. 1, where eNB (evolved Node B) is connected to CN(Core Net) through wired interface, RN (Relay Node) to eNB throughwireless interface and UE (User Equipment) to RN or eNB through wirelessinterface.

Generally, there are two kinds of pilot signals in LTE (Long TermEvolution) system (viz. version 8 generally mentioned), namely,Reference Signal (RS): Common Reference Signal (CRS) and DedicatedReference Signal (DRS).

CRS is sent by full band with specific configuration related to ID(Identity) of cell, that is, within one cell, the mode of CRS is thesame. Control channel PDCCH (Physical Downlink Control Channel) can onlybe demodulated by CRS, for PDCCH is detected by several userssimultaneously, and the pilot signal must be visible to all users and beidentical.

LTE-A system introduces DM-RS (Demodulation Reference Signal) for user'sdata demodulation and CSI-RS (Channel State Information ReferenceSignal) for UE reporting CQI (Channel Quality Indication)/PMI (PrecodingMatrix Indicator)/RI (Rank Indication). Actually, DM-RS is very similarto dedicated user pilot signal of LTE system, and the difference mainlylies in that DM-RS supports the transmission of multi-data streamthrough multiple ports while dedicated user pilot frequency of LTEsystem only supports the transmission of single-data stream throughsingle port. However, as time division duplex mode of RN needs toconsume OFDM (Orthogonal Frequency Division Multiplexing) symbol to beas transceiving handover time, the last OFDM symbol of subframe inbackhaul cannot be used, therefore some proposals suggest using shiftedDMRS pattern. But CSI-RS generally refers to exclusive pilot frequencyof cell. Presently, LTE-A has not yet determined pilot pattern of CSI-RSwhich has two alternative schemes: CDMT and CDMF, with the specificposition for pilot frequency not determined either.

In relay backhaul, as the last OFDM symbol of each subframe is to beused as transceiving handover time of RN, it cannot be used in backhaultransmission, therefore two revised DMRS transmission schemes are raisedat present, namely, shifted DMRS pattern and punctured DMRS pattern, soas to enable DMRS to avoid appearing in the last OFDM symbol. CRS andshifted DMRS pilot pattern of port 4 in present technology is shown inFIG. 2 while CRS and punctured DMRS pilot to pattern of port 4 inpresent technology is shown in FIG. 3.

For In-band relay, backhaul link shares band resource with eNB-macro UElink, so its control channel R-PDCCH doesn't conform to specificationsof original R8 and shall be redesigned. Currently, through thediscussion of 3GPP RAN1 standard conference, the following conclusionshave been reached for the design of R-PDCCH: eNB shall is send R-PDCCHstarting from the fourth symbol, therein, send Downlink grant at thefirst slot and send Uplink grant at the second slot. Multiplexing modefor R-PDSCH, R-PDCCH, PDSCH and PDCCH is shown in FIG. 4.

In the course of implementing embodiments of the present invention, theinventor finds out there are at least the problems below in the presenttechnology:

In current LTE-A system, there is no specific scheme for controllingresource allocation when CSI-RS and DM-RS exist in R-PDCCH.

SUMMARY OF THE INVENTION

The embodiments of the present invention provide a method and device forresource allocation of backhaul link control channel information, andput forward the configuration scheme of R-PDCCH resource forcircumstances of introducing DMRS and CSI-RS.

To achieve the above purposes, the embodiments of the present inventionprovide a method for resource allocation of backhaul link controlchannel information on one hand, with specific steps below:

The sending terminal equipment of backhaul link control channelinformation enables remaining REs which are not occupied by CSI-RSand/or DM-RS in OFDM symbol that contains REs for transmitting CSI-RSand/or DM-RS in physical resource block to constitute REG;

Said sending terminal equipment of said backhaul link control channelinformation shall abandon remaining REs in said OFDM symbol that failsto constitute REG and shall send backhaul link control channelinformation through said REG or abandon said REG.

On the other hand, the embodiments of the present invention also providea sending terminal equipment of backhaul link control channelinformation, further comprising:

Constitution module, which is used to enable remaining REs which are notoccupied by CSI-RS and/or DM-RS OFDM symbol that is in physical resourceblock and contains REs for transmitting CSI-RS and/or DM-RS toconstitute resource element group (REG);

Processing module, which is used to abandon remaining REs in said OFDMsymbol that fail to constitute REG and shall send backhaul link controlchannel information through REG composed of said constitution module orabandon REG composed of said constitution module.

Besides, the embodiments of the present invention also provide a methodof resource allocation for backhaul link control channel information,with specific steps below:

Receiving terminal equipment of backhaul link control channelinformation identifies REG in OFDM symbol that is in physical resourceblock and contains REs for transmitting CSI-RS and/or DM-RS;

Receiving terminal equipment of said backhaul link control channelinformation abandons receiving backhaul link control channel informationthrough remaining REs in said OFDM symbol that fail to constitute REG,and shall receive backhaul link control channel information through saidREG or abandon it.

Besides, the embodiments of the present invention also provide areceiving terminal equipment of backhaul link control channelinformation, further comprising:

Identification module, which is used to identify REG in OFDM symbol thatis in physical resource block and contains REs for transmitting CSI-RSand/or DM-RS;

Processing module, which is used to abandon receiving backhaul linkcontrol channel information through remaining REs in said OFDM symbolthat fail to constitute REG, and shall receive backhaul link controlchannel information through REG identified by said identification moduleor abandon it.

Compared with present technology, the embodiments of the presentinvention have the following advantages:

Upon application of technical solution proposed by embodiment of thisinvention and based on the condition of introducing DMRS and CSI-RS,make remaining REs which are not occupied by CSI-RS and/or DM-RS in OFDMsymbol that contains REs for transmitting CSI-RS and/or DM-RS constituteREG, to transmit backhaul link control channel information or abandonthem, thus, on the basis of maximizing the reservation of existing LTEsystem specification, specifying resource allocation scheme of backhaullink control channel information in corresponding physical resourceblock, giving consideration to both simple specification design and fullutilization of resources, and realizing flexible design and allocationin light of the demand of real system.

BRIEF DESCRIPTION OF THE DRAWINGS

To further explain the technical solution of the embodiments of thepresent invention or present technology, the drawings required by theembodiments or the existing technical description will be brieflyintroduced below. Obviously, the following described drawings only referto some embodiments of the present invention. Common technical personnelof the field can obtain other drawings according to these drawingswithout contributing creative work.

FIG. 1 is a network structure diagram of LTE-A system in the presenttechnology;

FIG. 2 is a diagram of port 4 CRS and shifted DMRS pilot pattern in thepresent technology;

FIG. 3 is a diagram of port 4 CRS and punctured DMRS pilot pattern inthe present technology;

FIG. 4 is a diagram of multiplexing mode for R-PDSCH, R-PDCCH, PDSCH andPDCCH in the present technology;

FIG. 5 is a flow diagram of the resource allocation method for backhaullink control channel information provided by the embodiments of thepresent invention at the sending terminal;

FIG. 6 is a flow diagram of the resource allocation method for backhaullink control channel information provided by the embodiments of thepresent invention at the receiving terminal;

FIG. 7 to FIG. 22 are the scene diagrams of several resource allocationsfor backhaul link control channel information provided by theembodiments of the present invention;

FIG. 23 is a structure diagram of sending terminal equipment forbackhaul link control channel information provided by the embodiments ofthe present invention;

FIG. 24 is a structure diagram of receiving terminal equipment forbackhaul link control channel information provided by the embodiments ofthe present invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The technical solution of the embodiments of the present invention willbe described clearly and completely in combination with the drawings.Apparently, the described embodiments are only a part of the embodimentsof the present invention. Other embodiments based on the embodiments ofthe present invention obtained by common technical personnel of thefield without contributing creative work shall be protected by thepresent invention.

In LTE-A system (generally referred to as version 10), relay node (RN)is introduced to improve system throughput and increase networkcoverage. The link between RN and eNB is called backhaul link. Onbackhaul link, eNB uses special control channel R-PDCCH to transmitrelevant control signaling to relay. There is always DMRS pilot signalposition with over 2 ports in R-PDCCH area; meanwhile CSI-RS may alsoexist.

Under such circumstance, it is impossible to map all available areas ofR-PDCCH on REG (Resource Element Group) in accordance with the mappingscheme of original version 8. Technical solution in the embodiments ofthe present invention will offer the specific resource allocation methodfor R-PDCCH under such circumstance, to simplify specification designand conduct flexible design and configuration of relay link controlchannel as per actual system requirements.

As shown in FIG. 5, it is a flow diagram of resource allocation methodof backhaul link control channel information provided by the embodimentsof the present invention, with specific steps below:

Step S501: The sending terminal equipment of backhaul link controlchannel information enables remaining REs in OFDM symbol that containsREs for transmitting CSI-RS and/or DM-RS in physical resource block toconstitute REG.

In specific application scene, the scheme for constituting REG in thisstep includes the combination of two or several schemes below:

Scheme I: The sending terminal equipment of backhaul link controlchannel information constitutes remaining REs which are not occupied byCSI-RS and/or DM-RS_in one OFDM symbol that only contains RE fortransmitting CSI-RS in physical resource block into REG. Furthermore,according to the quantity difference in remaining REs of such OFDMsymbol, the scheme further comprises the following two cases:

(1) When a physical resource block only comprises the RE fortransmitting CSI-RS, and the number of remaining REs in one OFDM symbolwhose adjacent OFDM symbol does not contain RE for transmitting CSI-RSis greater than four, the sending terminal equipment of said backhaullink control channel information will constitute each four remaining REsof said OFDM into an REG, and determine all the rest of remainingresource particles as remaining REs that fail to constitute REG in saidOFDM symbols.

(2) When a physical resource block only comprises the RE fortransmitting CSI-RS, and the number of remaining REs in one OFDM symbolwhose adjacent OFDM symbol does not contain RE for transmitting CSI-RSis less than four, the sending terminal equipment of said controlchannel information will determine all the rest of remaining resourceparticles as remaining REs that fail to constitute REG in said OFDMsymbols.

Scheme II: The sending terminal equipment of backhaul link controlchannel information enables remaining REs which are not occupied byCSI-RS and/or DM-RS in two adjacent OFDM symbols that contain REs fortransmitting CSI-RS and/or DM-RS in physical resource block toconstitute REG. Furthermore, according to the quantity difference inremaining REs of such OFDM symbol, the scheme further comprises thefollowing three cases:

(1) When the number of remaining REs in one OFDM symbol out of twoadjacent OFDM symbols that contain RE for transmitting CSI-RS and/orDM-RS is greater than four, while that of remaining RE in the other OFDMsymbol is less than four, the sending terminal equipment of saidbackhaul link control channel information will constitute each fourremaining REs of the OFDM symbol with the number of said remainingresource element greater than four into an REG; if the sum between thenumber of the rest of remaining REs after combination of REG in the OFDMsymbol with more than four said remaining REs and that of remaining REsin the OFDM symbol with less than four said remaining REs is greaterthan four, the sending terminal equipment of said backhaul link controlchannel information will constitute four remaining REs which are notoccupied by CSI-RS and/or DM-RS of two said OFDM symbols into an REG,and determine the rest of remaining resource particles as remaining REsthat fail to constitute REG in two said OFDM symbols.

(2) When the number of remaining resource elements in both of the twoadjacent OFDM symbols that contain RE for transmitting CSI-RS and/orDM-RS is greater than four respectively, the sending terminal equipmentof said backhaul link control channel information will constitute eachfour remaining REs of each said OFDM symbol into an REG; if the numberof the rest of remaining REs after combination of REG in two said OFDMsis greater than four, the sending terminal equipment of said backhaullink control channel information will constitute four remaining REswhich are not occupied by CSI-RS and/or DM-RS of two said OFDM symbolsinto an REG, and determine the rest of remaining resource particles asremaining REs that fail to constitute REG in two said OFDM symbols.

(3) When the number of remaining RE in both of the two adjacent OFDMsymbols that contain RE for transmitting CSI-RS and/or DM-RS is lessthan four respectively, while the total number of remaining RE in twosaid OFDM symbols is greater than four, the sending terminal equipmentof said backhaul link control channel information will constitute fourremaining REs which are not occupied by CSI-RS and/or DM-RS of two saidOFDM symbols into an REG, and determine the rest of remaining resourceparticles as remaining REs that fail to constitute REG in two said OFDMsymbols.

Step S502: the sending terminal equipment of backhaul link controlchannel information abandons remaining REs that fail to constitute REGin said OFDM symbol, and sends backhaul link control channel informationthrough said REG or abandons said REG.

When the sending terminal equipment of backhaul link control channelinformation constitutes several REGs in a physical resource block, thenduring this step, the sending terminal equipment of backhaul linkcontrol channel information can adopt the same processing strategy forall REGs, viz. it can either set all REGs to send backhaul link controlchannel information, or abandon all of them.

On the other hand, during this step, the sending terminal equipment ofbackhaul link control channel information can also adopt differentprocess strategies for each REG respectively, e.g.: send backhaul linkcontrol channel information through one or several REGs thereof, orabandon one or several therein.

However during this step, the remaining REs that fail to constitute REGin OFDM symbol shall all be abandoned.

The technical solution described above refers to the process ofrealizing technical solutions of the embodiments of the presentinvention at the sending terminal equipment side of backhaul linkcontrol channel information. Meanwhile, the embodiments of the presentinvention also provide the same process at the receiving terminalequipment side. The flow diagram is shown in FIG. 6, comprising thesteps below:

Step S601: the receiving terminal equipment of backhaul link controlchannel information identifies REG in OFDM symbol that contains RE fortransmitting CSI-RS and/or DM-RS in physical resource block.

Corresponding to the situation in step S501 of the aforesaid technicalsolution, in specific application scene, the scheme of constituting REGidentified in this step includes the combination of two or severalschemes below:

Scheme I: The receiving terminal equipment of backhaul link controlchannel information identifies REG in one OFDM symbol that contains onlyone RE for transmitting CSI-RS in physical resource block; moreover,based on the quantity difference of remaining REs in such OFDM symbol,the scheme further comprises the following two cases:

(1) When a physical resource block only comprises the REs fortransmitting CSI-RS, and the number of remaining REs in one OFDM symbolwhose adjacent OFDM symbol does not contain RE for transmitting CSI-RSis greater than four, the receiving terminal equipment of said backhaullink control channel information identifies in said OFDM symbol one REGcomposed of each four remaining REs, and the remaining REs that arecomposed of the rest of remaining resource particles that fail toconstitute REG.

(2) When a physical resource block only comprises the REs fortransmitting CSI-RS, and the number of remaining REs in one OFDM symbolwhose adjacent OFDM symbol does not contain RE for transmitting CSI-RSis less than four, the receiving terminal equipment of said backhaullink control channel information identifies the remaining REs that arecomposed by all remaining resource particles that fail to constitute REGin said OFDM symbols.

Scheme II: The receiving terminal equipment of backhaul link controlchannel information identifies REG in two adjacent OFDM symbols thatcontain RE for transmitting CSI-RS and/or DM-RS in physical resourceblock; moreover, based on the quantity difference of remaining REs insuch OFDM symbol, the scheme further comprises the following threecases:

(1) When the number of remaining REs in one OFDM symbol out of twoadjacent OFDM that contain RE for transmitting CSI-RS and/or DM-RS isgreater than four, while that of remaining REs in the other OFDM symbolis less than four, the receiving terminal equipment of said backhaullink control channel information identifies each four remaining REsforming into one REG in the OFDM symbol with more than four saidremaining REs; if the sum between the number of the rest of remainingREs after combination of REG in the OFDM symbol with more than four saidremaining REs and that of remaining REs in the OFDM symbol with lessthan four said remaining REs is greater than four, the receivingterminal equipment of said backhaul link control channel informationidentifies in said two OFDM symbol one REG composed of each fourremaining REs which are not occupied by CSI-RS and/or DM-RS, and theremaining REs that are composed of the rest of remaining resourceparticles that fail to constitute REG.

(2) When the number of remaining resource element in both of the twoadjacent OFDM symbols that contain REs for transmitting CSI-RS and/orDM-RS is greater than four respectively, the receiving terminalequipment of said backhaul link control channel information identifieseach four remaining REs forming into one REG in each said OFDM symbolrespectively; if the number of the rest of remaining REs aftercombination of REG in two said OFDM symbols is greater than four, thereceiving terminal equipment of said backhaul link control channelinformation identifies in said two OFDM symbol one REG composed of eachfour remaining REs which are not occupied by CSI-RS and/or DM-RS, andthe remaining REs that are composed of the rest of remaining resourceparticles that fail to constitute REG.

(3) When the number of remaining resource element in both of the twoadjacent OFDM symbols that contain REs for transmitting CSI-RS and/orDM-RS is less than four respectively, while the total number ofremaining resource element in two said OFDM symbols is greater thanfour, the receiving terminal equipment of said backhaul link controlchannel information identifies in said two OFDM symbol one REG composedof each four remaining REs which are not occupied by CSI-RS and/orDM-RS, and the remaining REs that are composed of the rest of remainingresource particles that fail to constitute REG.

Step S602: The receiving terminal equipment of said backhaul linkcontrol channel information abandons receiving backhaul link controlchannel information through the remaining REs that fail to constituteREG in said OFDM symbol, and receives backhaul link control channelinformation through REG or abandons it.

When identifying several REGs in a physical resource block, thereceiving terminal equipment of backhaul link control channelinformation can receive backhaul link control channel informationthrough one or several REG (s) respectively according to actualsituation, and/or abandon such operation.

However during this step, as for the remaining REs that fail toconstitute REG in OFDM symbol, the strategy is to abandon receivingbackhaul link control channel information through the remaining REs thatfail to constitute REG.

Compared with present technology, the embodiments of the presentinvention have the following advantages:

Upon application of technical solution proposed by embodiment of thisinvention and based on the condition of introducing DMRS and CSI-RS,make remaining REs which are not occupied by CSI-RS and/or DM-RS_in OFDMsymbol that contains REs for transmitting CSI-RS and/or DM-RS constituteREG to transmit backhaul link control channel information or abandonthem, thus, on the basis of maximizing the reservation of existing LTEsystem specification, specifying resource allocation scheme of backhaullink control channel information in corresponding physical resourceblock, giving consideration to both simple specification design and fullutilization of resources, and realizing flexible design and allocationin light of the demand of real system.

Detailed description of technical solution proposed by embodiment ofthis invention is given as below in combination with specificapplication context.

Technical solution proposed by the embodiments of the present inventionmainly aims at raising new R-PDCCH resource allocation scheme under thecircumstance of introducing DMRS and CSI-RS in R-PDCCH area, thusensuring normal processing and demodulation at sending and receivingterminals of R-PDCCH.

Technical solutions proposed by the embodiments of the present inventionfirst reserve all REs occupied by CSI-RS port configured by eNB. DMRSbelongs to special pilot frequency of UE, so eNB may configure DM-RSwith different port numbers for various RNs. To ensure uniform methodfor control resource allocation of all RNs, the technical solutionproposed by the embodiments of the present invention reserves all REsoccupied by 4 DM-RS ports. As CRS and CSI-RS as well as CRS and DMRScannot be multiplexed in the same OFDM symbol, OFDM symbols with DMRSand CSI-RS can be divided into two cases below:

Case I: there exists CSI-RS only in a certain OFDM symbol, and no inOFDM symbol of backhaul link adjacent to the symbol.

For such case, there are two R-PDCCH configuration schemes:

Scheme I: Constitute each 4 REs out of remaining REs more than 4 in OFDMsymbols into one REG and configure it to R-PDCCH, then abandon those REsless than 4 after the above configuration, with examples shown in FIGS.7, 8 and 9:

In the scheme shown in FIG. 7, there are 8 REs transmitting CSI-RS inone OFDM symbol of slot 1 with 4 REs left, therefore, constitute the 4into REG for transmitting R-PDCCH.

In the scheme shown in FIG. 8, there are 4 REs transmitting CSI-RS inone OFDM symbol of slot 2 with 8 REs left, therefore, constitute each 4REs out of the 8 into one REG for transmitting R-PDCCH.

In the scheme shown in FIG. 9, there are 2 REs transmitting CSI-RS inone OFDM symbol of the slot 2 with 10 REs left, therefore, constituteeach 4 REs out of the first 8 into one REG, two REGs in total, fortransmitting R-PDCCH, then abandon the last two REs.

Scheme II: Abandon all remaining REs in the OFDM symbol, not fortransmitting R-PDCCH, with examples shown in FIGS. 10 and 11:

In the scheme shown in FIG. 10, there are 8 REs transmitting CSI-RS inone OFDM symbol of slot 1 with 4 REs left, therefore, constitute the 4REs into REG and abandon it, not for transmitting R-PDCCH.

In the scheme shown in FIG. 11, there are 2 REs transmitting CSI-RS inone OFDM symbol of slot 2 with 10 REs left, therefore, constitute each 4REs out of the first 8 into one REG and abandon the total two REGs, notfor transmitting R-PDCCH, then abandon the last two REs as well.

Case II: there exist(s) DM-RS and/or CSI-RS at least in two successiveOFDM symbols.

For such case, there are three R-PDCCH configuration schemes:

Scheme I: For each PRB, constitute each 4 REs out of the available REsmore than 4 in each OFDM symbol of two successive ones into one REG fortransmitting R-PDCCH, then abandon remaining REs less than 4 in eachOFDM symbol after the above configuration, with examples shown in FIGS.12, 13, 14 and 15.

In the scheme shown in FIG. 12, two adjacent OFDM symbols of slot 1transmit DM-RS in slot 1 and 6 REs out of each OFDM symbol are reservedfor DM-RS, so 6 REs are left in each OFDM symbol. Therefore, select thefirst 4 REs in each OFDM symbol to form an REG for transmitting R-PDCCH;besides, there are 2 REs left in each OFDM symbol, which shall beabandoned and not used for transmitting R-PDCCH. In FIG. 12, there are 2REGs totally formed in two adjacent OFDM symbols for transmittingR-PDCCH.

It needs to be pointed out that in FIG. 12, there is still one OFDMsymbol transmitting CSI-RS in the slot 2, which can be processed byrelevant scheme in the aforesaid case I. Such mode of processing bycombination of two schemes can better enrich resource allocation scheme.The protection scope of the present invention will not be influenced byspecific constitution scheme adopted and specific form changes of thecombination.

In the scheme shown in FIG. 13, two adjacent OFDM symbols transmitCSI-RS in slot 2, and 4 REs out of each OFDM symbol are transmittingCSI-RS, so 8 REs are left in each OFDM symbol. Therefore, constituteeach 4 REs in remaining 8 REs of each OFDM symbol into an REG fortransmitting R-PDCCH; after the above configuration, no RE is left. InFIG. 13, there are 4 REGs totally formed in two adjacent OFDM symbolsfor transmitting R-PDCCH.

In the scheme shown in FIG. 14, two adjacent OFDM symbols transmitCSI-RS in slot 2, and 2 REs out of each OFDM symbol are transmittingCSI-RS, so 10 REs are left in each OFDM symbol. Therefore, constituteeach 4 REs out of the first 8 REs in remaining 10 REs of each OFDMsymbol into an REG for transmitting R-PDCCH; after the aboveconfiguration, there are 2 REs left in each symbol and 4 REs in two OFDMsymbols, which shall be abandoned and not used for transmitting R-PDCCH.In FIG. 14, there are 4 REGs totally formed in two adjacent OFDM symbolsfor transmitting R-PDCCH, with 4 REs abandoned.

In the scheme shown in FIG. 15, two adjacent OFDM symbols transmit DM-RSin slot 1, thereinto, the left-side OFDM symbol also transmits CSI-RS,and 6 REs in each OFDM symbol are reserved for DM-RS, with 4 REs in theleft-side OFDM symbol transmitting CSI-RS. Therefore, left-side OFDMsymbol has 2 REs left (less than 4), which shall be abandoned.Right-side OFDM symbol has 6 REs left, the first 4 REs of which shall beformed into an REG for transmitting R-PDCCH with the last 2 REsabandoned. In FIG. 15, there is 1 REG totally formed in two adjacentOFDM symbols in slot 1 for transmitting R-PDCCH, with 4 REs abandoned.

Scheme II: For each PRB, constitute each 4 REs out of the available REsmore than 4 in each OFDM symbol of the two ones into one REG fortransmitting R-PDCCH. If the total remaining REs of the two OFDM symbolsafter the above configuration is not less than 4, put remaining REs ofthe two OFDM symbols together to form an REG with each 4 REs, and thenabandon remaining REs afterward. Examples are shown in FIGS. 16, 17 and18.

In the scheme shown in FIG. 16, two adjacent OFDM symbols transmit DM-RSin slot 1 and 2 respectively. For the adjacent two in slot 1, there are6 REs in each OFDM symbol reserved for DM-RS, so each OFDM symbol has 6REs left, the first 4 of which shall be selected to form an REG, with 2REs left in each OFDM symbol, and 4 REs in total in two OFDM symbols.Therefore, constitute the last two REs left in each OFDM symbol of slot1 into REG, and use all the above REGs to transmit R-PDCCH. As for theadjacent two in slot 2, there are 6 REs transmitting DM-RS in each OFDMsymbol respectively, with 8 REs transmitting CSI-RS additionally, so 2REs are left in each OFDM symbol, 4 REs in total. Therefore, constituteremaining 2 REs (4 in total) in each OFDM symbol of slot 2 into one REGfor transmitting R-PDCCH. In FIG. 16, there are 4 REGs totally formed intwo adjacent OFDM symbols of slot 1 and 2, all of which are used fortransmitting R-PDCCH.

In the scheme shown in FIG. 17, two adjacent OFDM symbols transmitCSI-RS in slot 2, and one RE out of each OFDM symbol is transmittingCSI-RS with 11 REs left in each OFDM symbol respectively, so constituteeach 4 of the first 8 REs in each OFDM symbol into one REG. Besides,there are 3 REs left in each OFDM symbol, 6 in total. Therefore,constitute the first 2 REs left in each OFDM symbol into an REG, andthen each OFDM has one RE left, 2 in total, which shall be abandoned.All of the above REGs shall be used for transmitting R-PDCCH. In FIG.17, there are 5 REGs totally formed in two adjacent OFDM symbols of slot2, all of which are used for transmitting R-PDCCH, with 2 REs abandoned.

In the scheme shown in FIG. 18, two adjacent OFDM symbols transmit DM-RSin slot 1, thereinto, the left-side OFDM symbol also transmits CSI-RS,and 6 REs out of each OFDM symbol are reserved for DM-RS, with 4 REs ofthe left-side OFDM symbol transmitting CSI-RS. The right-side OFDMsymbol has 6 REs left, the first 4 of which shall be constituted intoone REG with 2 REs left. Meanwhile, left-side OFDM symbol also has 2available REs left. Therefore, the four REs left by the above two OFDMsymbols can be constituted into an REG for transmitting R-PDCCH. In FIG.18, there are 2 REGs totally formed in two adjacent OFDM symbols of slot1 for transmitting R-PDCCH.

Scheme III: Abandon all REs in the two OFDM symbols, not fortransmitting R-PDCCH, with examples shown in FIGS. 19, 20, 21 and 22.

In the scheme shown in FIG. 19, two adjacent OFDM symbols transmit DM-RSin slot 1 and 2 with 6 REs transmitting DM-RS in each OFDM symbolrespectively, so each OFDM symbol has 6 REs left, the first 4 of whichshall be selected to form an REG, with 2 left in each symbol. Therefore,constitute the last two REs left in each OFDM symbol of slot 1 and 2into an REG, and then abandon all the above REGs instead of using themfor transmitting R-PDCCH. In FIG. 19, there are 6 REGs totally formed intwo adjacent OFDM symbols of slot 1 and 2, which shall all be abandonedinstead of being used for transmitting R-PDCCH.

It needs to be pointed out that in FIG. 19, there is still one OFDMsymbol transmitting CSI-RS in the slot 1, which can be processed byrelevant scheme in the aforesaid case I. Such mode of processing bycombination of two schemes can better enrich resource allocation scheme.The protection scope of the present invention will not be influenced byspecific constitution scheme adopted and specific form changes of thecombination.

In the scheme shown in FIG. 20, two adjacent OFDM symbols transmit DM-RSin slot 1 and 2 with 6 REs transmitting DM-RS in each OFDM symbolrespectively, so each OFDM symbol has 6 REs left, the first 4 of whichshall be selected to form an REG, with 2 left in each symbol. Therefore,constitute the last two REs left in each OFDM symbol of slot 1 and 2into an REG. Then in FIG. 20, there are 6 REGs totally formed in twoadjacent OFDM symbols of slot 1 and 2, among which the three REGs in twoadjacent OFDM symbols of slot 1 shall be abandoned instead of being usedfor transmitting R-PDCCH, while the three REGs in two adjacent OFDMsymbols of slot 2 shall all be used for transmitting R-PDCCH.

It needs to be pointed out that in FIG. 20, there is still one OFDMsymbol transmitting CSI-RS in the slot 1, which can be processed byrelevant scheme in the aforesaid case I. Such mode of processing bycombination of two schemes can better enrich resource allocation scheme.The protection scope of the present invention will not be influenced byspecific constitution scheme adopted and specific form changes of thecombination.

In the scheme shown in FIG. 21, two adjacent OFDM symbols transmit DM-RSin slot 1 and 2 respectively. For the two adjacent OFDM symbols in slot2, there are 6 REs in each OFDM symbol reserved for DM-RS with 4 REstransmitting CSI-RS, so there are only 2 REs left in each OFDM symbol, 4REs in total. Therefore, constitute remaining 2 REs in each OFDM symbolof slot 2 into one REG, and then abandon it instead of using it fortransmitting R-PDCCH. For slot 1, there are 6 REs in each OFDM symbolreserved for DM-RS, so each OFDM symbol has 6 REs left, the first fourof which shall be selected to form one REG. Besides, 2 REs are left ineach OFDM symbol, 4 REs in total. Therefore, constitute the last two REsleft in each OFDM symbol of slot 1 into REG. In FIG. 21, there are 4REGs totally formed in two adjacent OFDM symbols of slot 1 and 2, amongwhich the three REGs in two adjacent OFDM symbols of slot 1 shall all beused for transmitting R-PDCCH, while 1 REG in two adjacent OFDMs of slot2 shall be abandoned instead of being used for transmitting R-PDCCH.

In the scheme shown in FIG. 22, two adjacent OFDM symbols transmitCSI-RS in slot 2, and 2 REs out of each OFDM symbol are transmittingCSI-RS with 10 REs left in each OFDM symbol respectively, so constituteeach 4 of the first 8 REs out of remaining 10 in each OFDM symbol intoone REG. After the above configuration, each symbol has 2 REs left, 4REs in total, which shall be formed into one REG. Therefore, there are 5REGs totally formed in two adjacent OFDM symbols for CSI-RS transmissionin slot 2, all of which shall be abandoned instead of being used fortransmitting R-PDCCH. For two adjacent OFDM symbols for DM-RStransmission in slot 1, totally 3 REGs are configured as per scheme IIfor transmitting R-PDCCH. In FIG. 22, two adjacent OFDM symbols of eachslot form 8 REGs totally, among which 3 REGs in two adjacent OFDMsymbols of slot 1 shall all be used for transmitting R-PDCCH, while 5REGs in two adjacent OFDMs of slot 2 shall be abandoned.

Compared with the present technology, the embodiments of the presentinvention have the following advantages:

Upon application of technical solution proposed by embodiment of thisinvention and based on the condition of introducing DMRS and CSI-RS,make remaining REs which are not occupied by CSI-RS and/or DM-RS in OFDMsymbol that contains RE for transmitting CSI-RS and/or DM-RS constituteREG to transmit backhaul link control channel information or abandonthem, thus, on the basis of maximizing the reservation of existing LTEsystem specification, specifying resource allocation scheme of backhaullink control channel information in corresponding physical resourceblock, giving consideration to both simple specification design and fullutilization of resources, and realizing flexible design and allocationin light of the demand of real system.

To realize the technical solutions proposed by the embodiments of thepresent invention, a sending terminal equipment of backhaul link controlchannel information is also provided with its structure diagram shown inFIG. 23, further comprising:

Constitution module 231, which is used to constitute the remaining REswhich are not occupied by CSI-RS and/or DM-RS OFDM symbol that containsREs for transmitting CSI-RS and/or DM-RS in physical resource block intoREG.

In specific application scene, constitution scheme of REG ofconstitution module 231 comprises the following two kinds, or thecombination of several schemes thereof:

Scheme I: Constitution module 231 constitutes the REs for transmittingCSI-RS only in the physical resource blocks and the remaining REs whichare not occupied by CSI-RS and/or DM-RS in an OFDM symbol adjacent tothe OFDM symbol not containing REs for transmitting CSI-RS into REG,specifically as:

When a physical resource block only comprises the REs for transmittingCSI-RS, and the number of remaining REs in one OFDM symbol whoseadjacent OFDM symbol does not contain RE for transmitting CSI-RS isgreater than four, said constitution module 231 will constitute eachfour remaining REs of said OFDM into an REG, and determine all the restof remaining resource particles as remaining REs that fail to constituteREG in said OFDM symbols; or

When a physical resource block only comprises the REs for transmittingCSI-RS, and the number of remaining REs in one OFDM symbol whoseadjacent OFDM symbol does not contain RE for transmitting CSI-RS is lessthan four, said constitution module 231 will determine all the rest ofremaining resource particles as remaining REs that fail to constituteREG in said OFDM symbols.

Scheme II: Constitution module 231 constitutes remaining REs which arenot occupied by CSI-RS and/or DM-RS in two adjacent OFDM symbols thatcontain REs for transmitting CSI-RS and/or DM-RS in physical resourceblock into REG, further comprising:

When the number of remaining REs in one OFDM symbol out of two adjacentOFDM symbols that contain REs for transmitting CSI-RS and/or DM-RS isgreater than four, while that of remaining REs in the other OFDM symbolis less than four, said constitution module 231 will constitute eachfour remaining REs of the OFDM symbol with the number of said remainingresource elements greater than four into an REG; if the sum between thenumber of the rest of remaining REs after combination of REG in the OFDMsymbol with more than four said remaining REs and that of remaining REsin the OFDM symbol with less than four said remaining REs is greaterthan four, said constitution module 231 will constitute four remainingREs which are not occupied by CSI-RS and/or DM-RS of two said OFDMsymbols into an REG, and determine the rest of remaining resourceparticles as remaining REs that fail to constitute REG in two said OFDMsymbols;

When the number of remaining REs in both of the two adjacent OFDMsymbols that contain REs for transmitting CSI-RS and/or DM-RS is greaterthan four respectively, said constitution module 231 will constituteeach four remaining REs of each said OFDM symbol into an REG; if thenumber of the rest of remaining REs after combination of REG in two saidOFDMs is greater than four, said constitution module 231 will constitutefour remaining REs which are not occupied by CSI-RS and/or DM-RS of twosaid OFDM symbols into an REG, and determine the rest of remainingresource particles as remaining REs that fail to constitute REG in twosaid OFDM symbols;

When the number of remaining REs in both of the two adjacent OFDMsymbols that contain RE for transmitting CSI-RS and/or DM-RS is lessthan four respectively, while the total number of remaining REs in twosaid OFDM symbols is greater than four, said constitution module 231will constitute four remaining REs which are not occupied by CSI-RSand/or DM-RS of two said OFDM symbols into an REG, and determine therest of remaining resource particles as remaining REs that fail toconstitute REG in two said OFDM symbols.

Processing module 232, which is used to abandon remaining REs in saidOFDM symbol that fail to constitute REG and send backhaul link controlchannel information through said REG composed of constitution module 231or abandon said REG composed of constitution module 231.

When constitution module 231 constitutes several REGs in a physicalresource block, processing module 232 abandons remaining REs in saidOFDM symbol that fail to constitute REG and send backhaul link controlchannel information through one of or several REGs thereof and/orabandon one or several REGs thereof.

On the other hand, the embodiments of the present invention also providea receiving terminal equipment of backhaul link control channelinformation with its structural diagram shown in FIG. 24 furthercomprising:

Identification module 241, which is used to identify REG in OFDM symbolthat is in physical resource block and contains REs for transmittingCSI-RS and/or DM-RS.

In specific application scene, constitution scheme of REG identified byidentification module 241 comprises the following two kinds, or thecombination of several schemes thereof:

Scheme I: Identification module 241 identifies REG in an OFDM symbolthat only contains REs for transmitting CSI-RS in the physical resourceblocks and that is adjacent to the OFDM symbol not containing REs fortransmitting CSI-RS, specifically as:

When a physical resource block only comprises the RE for transmittingCSI-RS, and the number of remaining REs in one OFDM symbol whoseadjacent OFDM symbol does not contain RE for transmitting CSI-RS isgreater than four, said identification module 241 identifies in saidOFDM symbols one REG composed of each four remaining REs, and theremaining REs that are composed of the rest of remaining resourceparticles that fail to constitute REG.

When a physical resource block only comprises the RE for transmittingCSI-RS, and the number of remaining REs in one OFDM symbol whoseadjacent OFDM symbol does not contain RE for transmitting CSI-RS is lessthan four, said identification module 241 identifies the remaining REsthat are composed of all the rest of remaining resource particles thatfail to constitute REG in said OFDM symbols.

Scheme II: Identification module 241 identifies REG in two adjacent OFDMsymbols that contain REs for transmitting CSI-RS and DM-RS in physicalresource block, specifically as:

When the number of remaining REs in one OFDM symbol out of two adjacentOFDM symbols that contain REs for transmitting CSI-RS and/or DM-RS isgreater than four, while that of remaining REs in the other OFDM symbolis less than four, said identification module 241 identifies each fourremaining REs forming into one REG in the OFDM symbol with more thanfour said remaining REs; if the sum between the number of the rest ofremaining REs after combination of REG in the OFDM symbol with more thanfour said remaining REs and that of remaining REs in the OFDM symbolwith less than four said remaining REs is greater than four, saididentification module 241 also identifies in two said OFDM symbols theREG composed of four remaining REs which are not occupied by CSI-RSand/or DM-RS and the remaining REs that are composed of the rest ofremaining resource particles that fail to constitute REG;

When the number of remaining RE in both of the two adjacent OFDM symbolsthat contain RE for transmitting CSI-RS and/or DM-RS is greater thanfour respectively, said identification module 241 will identifies eachfour remaining REs forming into one REG in said OFDM symbolrespectively; if the number of the rest of remaining REs aftercombination of REG in two said OFDMs is greater than four, saididentification module 241 identify in two said OFDM symbols the REGcomposed of four remaining REs which are not occupied by CSI-RS and/orDM-RS and the remaining REs that are composed of the rest of remainingresource particles that fail to constitute REG.

When the number of remaining RE in both of the two adjacent OFDM symbolsthat contain REs for transmitting CSI-RS and/or DM-RS is less than fourrespectively while the total number of remaining REs in two said OFDMsymbols is greater than four, said identification module 241 identifiesin two said OFDM symbols the REG composed of four remaining REs whichare not occupied by CSI-RS and/or DM-RS and the remaining REs that arecomposed of the rest of remaining resource particles that fail toconstitute REG.

Processing module 242, which is used to abandon receiving backhaul linkcontrol channel information through the remaining REs in said OFDMsymbol that fail to constitute REG and receive backhaul link controlchannel information through said REG identified by identification module241 or abandon receiving backhaul link control channel informationthrough REG identified through said identification module 241.

When identification module 241 identifies several REGs in a physicalresource block, processing module 242 abandons receiving backhaul linkcontrol channel information through remaining REs in said OFDM symbolthat fail to constitute REG and receives backhaul link control channelinformation through one of or several REGs thereof and/or abandonsreceiving backhaul link control channel information through one orseveral REGs thereof.

Compared with present technology, the embodiments of the presentinvention have the following advantages:

Upon application of technical solution proposed by embodiment of thisinvention and based on the condition of introducing DMRS and CSI-RS,make remaining REs which are not occupied by CSI-RS and/or DM-RS in OFDMsymbol that contains REs for transmitting CSI-RS and/or DM-RS constituteREG to transmit backhaul link control channel information or abandonthem, thus, on the basis of maximizing the reservation of existing LTEsystem specification, specifying resource allocation scheme of backhaullink control channel information in corresponding physical resourceblock, giving consideration to both simple specification design and fullutilization of resources, and realizing flexible design and allocationin light of the demand of real system.

Through description of the above embodiments, technical personnel of thefield can clearly understand that the present invention is realizeddepending on software and necessary general hardware platform, and alsocan be realized through hardware, while the former is better in manycases. Based on this understanding, the technical solution of thepresent invention or the part making contributions to present technologycan be essentially reflected by means of software product. This computersoftware product is stored in a storage medium, including severalinstructions to enable a computer unit (such as personal computer,sever, or network equipment, etc.) to implement the methods described inall embodiments of the present invention.

Technical personnel of the field can understand that the drawings onlyrefer to the diagram of a preferred embodiment, and the module orprocedure is not indispensable for the implementation of the embodimentsof the present invention.

Technical personnel of the field can understand that the module of theunit of an embodiment can be distributed in such unit according toembodiment description, or located in one or more units of anotherembodiment through corresponding changes. Modules of the embodimentsmentioned above can be merged into one module, or further divided intomulti-submodules.

The number of the aforementioned embodiments of the present invention isonly used for description rather than for representing advantages ordisadvantages.

Only several specific embodiments of the present invention are releasedabove. However, the present invention is not only comprised of those.Any change that technical personnel of the field can predict shall beprotected by the present invention.

1. A method for resource allocation of backhaul link control channelinformation, which comprises the following steps: the sending terminalequipment of backhaul link control channel information enables remainingREs which are not occupied by CSI-RS and/or DM-RS in OFDM symbol thatcontains REs for transmitting CSI-RS and/or DM-RS in physical resourceblock to constitute REG; said sending terminal equipment of saidbackhaul link control channel information abandons remaining REs in saidOFDM symbols that fail to constitute REG and sends backhaul link controlchannel information through said REG or abandons said REG.
 2. The methodas claimed in claim 1, wherein, the sending terminal equipment ofbackhaul link control channel information enables remaining REs whichare not occupied by CSI-RS and/or DM-RS in OFDM symbol that contains REsfor transmitting CSI-RS and/or DM-RS in physical resource block toconstitute REG, further including: said sending terminal equipment ofbackhaul link control channel information constitutes the REs fortransmitting CSI-RS only in the physical resource blocks and theremaining REs which are not occupied by CSI-RS and/or DM-RS in an OFDMsymbol adjacent to the OFDM symbol not containing REs for transmittingCSI-RS into REG; and/or, said sending terminal equipment of backhaullink control channel information constitutes remaining REs in twoadjacent OFDM symbols of the REs comprising transmission CSI-RS and/orDM-RS in physical resource block into REG.
 3. The method as claimed inclaim 2, wherein, said sending terminal equipment of said backhaul linkcontrol channel information constitutes remaining REs which are notoccupied by CSI-RS and/or DM-RS in OFDM symbol that only contains REsfor transmitting CSI-RS and/or DM-RS in physical resource block intoREG, specifically as: when a physical resource block only comprises theREs for transmitting CSI-RS, and the number of remaining REs which arenot occupied by CSI-RS and/or DM-RS in one OFDM symbol whose adjacentOFDM symbol does not contain RE for transmitting CSI-RS is greater thanfour, the sending terminal equipment of said backhaul link controlchannel information will constitute each four remaining REs of said OFDMinto a REG, and determine the rest of the remaining resource particlesas remaining REs that fail to constitute REG in said OFDM symbols; whena physical resource block only comprises the RE for transmitting CSI-RS,and the number of remaining REs in one OFDM symbol whose adjacent OFDMsymbol does not contain RE for transmitting CSI-RS is less than four,the sending terminal equipment of said backhaul link control channelinformation will determine all the rest of the remaining resourceparticles as remaining REs that fail to constitute REG in said OFDMsymbols.
 4. The method as claimed in claim 2, wherein, the sendingterminal equipment of backhaul link control channel informationconstitutes remaining REs which are not occupied by CSI-RS and/or DM-RSin two adjacent OFDM symbol that contains REs for transmitting CSI-RSand/or DM-RS in physical resource block into REG, specifically as: whenthe number of remaining REs in one OFDM symbol out of two adjacent OFDMsymbols that contain REs for transmitting CSI-RS and/or DM-RS is greaterthan four, while that of remaining REs in the other OFDM symbol is lessthan four, the sending terminal equipment of said backhaul link controlchannel information will constitute each four remaining REs of the OFDMsymbol with the number of said remaining REs greater than four into anREG; if the sum between the number of the rest of remaining REs aftercombination of REG in the OFDM symbol with more than four said remainingREs and that of remaining REs in the OFDM symbol with less than foursaid remaining REs which are not occupied by CSI-RS and/or DM-RS isgreater than four, the sending terminal equipment of said backhaul linkcontrol channel information will constitute four remaining REs of twosaid OFDM symbols into a REG, and determine the rest of the remainingresource particles as remaining REs that fail to constitute REG in twoof said OFDM symbols; when the number of remaining REs in both of thetwo adjacent OFDM symbols that contain REs for transmitting CSI-RSand/or DM-RS is greater than four respectively, the sending terminalequipment of said backhaul link control channel information willconstitute each four remaining REs of each said OFDM symbol into an REG;if the number of the rest of remaining REs after combination of REG intwo said OFDMs is greater than four, the sending terminal equipment ofsaid backhaul link control channel information will constitute fourremaining REs which are not occupied by CSI-RS and/or DM-RS of two saidOFDM symbols into an REG, and determine the rest of the remainingresource particles as remaining REs that fail to constitute REG in twosaid OFDM symbols; when the number of remaining REs in both of the twoadjacent OFDM symbols that contain REs for transmitting CSI-RS and/orDM-RS is less than four respectively but the total number of remainingREs in two said OFDM symbols is greater than four, the sending terminalequipment of said backhaul link control channel information willconstitute four remaining REs which are not occupied by CSI-RS and/orDM-RS of two said OFDM symbols into an REG, and determine the rest ofthe remaining resource particles as remaining REs that fail toconstitute REG in two said OFDM symbols.
 5. The method as claimed inclaim 1, wherein, said sending terminal equipment of backhaul linkcontrol channel information abandons the remaining REs that fail toconstitute REG in said OFDM symbol, then sends backhaul link controlchannel information through said REG or abandons said REG, specificallyas: when the sending terminal equipment of backhaul link control channelinformation constitutes several REGs in a physical resource block, thesending terminal equipment of said backhaul link control channelinformation shall abandon the remaining REs in said OFDM symbol thatfail to constitute REG and shall send backhaul link control channelinformation through said one or several REGs, and/or abandon said one orseveral REGs.
 6. A sending terminal equipment for backhaul link controlchannel information, which comprises: constitution module, used toconstitute remaining REs which are not occupied by CSI-RS and/or DM-RSin OFDM symbol that is in a physical resource block and contains REs fortransmitting CSI-RS and/or DM-RS into a resource element group (REG);processing module, used to abandon remaining REs in said OFDM symbolthat fail to constitute REG and send backhaul link control channelinformation through REG composed of said constitution module or abandonREG composed of said constitution module.
 7. The sending terminalequipment for backhaul link control channel information as claimed inclaim 6, wherein, said constitution module: constitutes the REs fortransmitting CSI-RS only in the physical resource blocks and theremaining REs which are not occupied by CSI-RS and/or DM-RS in an OFDMsymbol adjacent to the OFDM symbol not containing REs for transmittingCSI-RS into REG; and/or, said constitution module constitutes remainingREs which are not occupied by CSI-RS and/or DM-RS in two adjacent OFDMsymbols that contains REs for transmitting CSI-RS and/or DM-RS inphysical resource block into REG.
 8. The sending terminal equipment forbackhaul link control channel information as claimed in claim 7,wherein, said constitution module constitutes the REs for transmittingCSI-RS only in the physical resource blocks and the remaining REs whichare not occupied by CSI-RS and/or DM-RS in an OFDM symbol adjacent tothe OFDM symbol not containing RE for transmitting CSI-RS into REG,specifically as: when a physical resource block only comprises the REsfor transmitting CSI-RS, and the number of remaining REs in one OFDMsymbol whose adjacent OFDM symbol does not contain RE for transmittingCSI-RS is greater than four, said constitution module will constituteeach four remaining REs of said OFDM into an REG, and determine the restof remaining resource particles as remaining REs that fail to constituteREG in said OFDM symbols; when a physical resource block only comprisesthe REs for transmitting CSI-RS, and the number of remaining REs in oneOFDM symbol whose adjacent OFDM symbol does not contain RE fortransmitting CSI-RS is less than four, said constitution module willconstitute each four remaining REs of said OFDM symbol will determineall the rest of remaining resource particles as remaining REs that failto constitute REG in said OFDM symbols.
 9. The sending terminalequipment for backhaul link control channel information as claimed inclaim 7, wherein, said constitution module constitutes remaining REswhich are not occupied by CSI-RS and/or DM-RS in two adjacent OFDMsymbols of the REs comprising transmission CSI-RS and/or DM-RS inphysical resource block into REG, specifically as: when the number ofremaining REs in one OFDM symbol out of two adjacent OFDM symbols thatcontain REs for transmitting CSI-RS and/or DM-RS is greater than four,while that of remaining REs in the other OFDM symbol is less than four,said constitution module will constitute each four remaining REs of theOFDM symbol with the number of said remaining RE greater than four intoa REG; if the sum between the number of the rest of remaining REs aftercombination of REG in the OFDM symbol with more than four said remainingREs which are not occupied by CSI-RS and/or DM-RS and that of remainingREs in the OFDM symbol with less than four said remaining REs is greaterthan four, said constitution module will constitute four remaining REsof two said OFDM symbols into a REG, and determine remaining resourceparticles as remaining REs that fail to constitute REG in two said OFDMsymbols; when the number of remaining RE in both of the two adjacentOFDM symbols that contain REs for transmitting CSI-RS and/or DM-RS isgreater than four respectively, said constitution module will constituteeach four remaining REs of each said OFDM symbol into a REG; if thenumber of the rest of remaining REs after combination of REG in two saidOFDMs is greater than four, said constitution module will constitutefour remaining REs which are not occupied by CSI-RS and/or DM-RS of twosaid OFDM symbols into a REG, and determine the rest of remainingresource particles as remaining REs that fail to constitute REG in twosaid OFDM symbols; when the number of remaining REs in both of the twoadjacent OFDM symbols that contain REs for transmitting CSI-RS and/orDM-RS is less than four respectively, while the total number ofremaining REs in two said OFDM symbols is greater than four, saidconstitution module will constitute four remaining REs which are notoccupied by CSI-RS and/or DM-RS of two said OFDM symbols into a REG, anddetermine the rest of remaining resource particles as remaining REs thatfail to constitute REG in two said OFDM symbols.
 10. The sendingterminal equipment for backhaul link control channel information asclaimed in claim 6, wherein: when said constitution module constitutesseveral REGs in a physical resource block, said processing moduleabandons remaining REs in said OFDM symbol that fail to constitute REGand sends backhaul link control channel information through one of orseveral REGs thereof and/or abandons one or several REGs thereof.
 11. Amethod for resource allocation of backhaul link control channelinformation, which comprises the following steps: receiving terminalequipment of backhaul link control channel information identifies REG inOFDM symbol that is in physical resource block and contains REs fortransmitting CSI-RS and/or DM-RS; receiving terminal equipment of saidbackhaul link control channel information abandons receiving backhaullink control channel information through remaining REs in said OFDMsymbol that fail to constitute REG, receives backhaul link controlchannel information through said REG or abandon receiving backhaul linkcontrol channel information through said REG.
 12. The method as claimedin claim 11, wherein, receiving terminal equipment of said backhaul linkcontrol channel information identifies REG in OFDM symbol that is in aphysical resource block and contains REs for transmitting CSI-RS and/orDM-RS, further comprising: receiving terminal equipment of said backhaullink control channel information identifies REG in an OFDM symbol thatonly contains REs for transmitting CSI-RS in the physical resourceblocks and that is adjacent to the OFDM symbol not containing RE fortransmitting CSI-RS; and/or, receiving terminal equipment of backhaullink control channel information identifies REG in two adjacent OFDMsymbols that contain REs for transmitting CSI-RS and/or DM-RS inphysical resource block.
 13. The method as claimed in claim 12, wherein,receiving terminal equipment of said backhaul link control channelinformation identifies REG in an OFDM symbol that only contains REs fortransmitting CSI-RS in the physical resource blocks and that is adjacentto the OFDM symbol not containing RE for transmitting CSI-RS, furtherincluding: when a physical resource block only comprises the REs fortransmitting CSI-RS, and the number of remaining REs in one OFDM symbolwhose adjacent OFDM symbol does not contain RE for transmitting CSI-RSis greater than four, the receiving terminal equipment of said backhaullink control channel information identifies one REG composed of eachfour remaining REs in said OFDM symbol, and the remaining REs that failto constitute REG composed of the rest of remaining resource particles;when a physical resource block only comprises the REs for transmittingCSI-RS, and the number of remaining REs in one OFDM symbol whoseadjacent OFDM symbol does not contain RE for transmitting CSI-RS is lessthan four, the receiving terminal equipment of said backhaul linkcontrol channel information identifies the remaining REs that arecomposed by all remaining resource particles that fail to constitute REGin said OFDM symbols.
 14. The method as claimed in claim 12, wherein,receiving terminal equipment of backhaul link control channelinformation identifies REG in two adjacent OFDM symbols that contain REsfor transmitting CSI-RS and/or DM-RS in physical resource block,specifically as: when the number of remaining REs in one OFDM symbol outof two adjacent OFDM symbols that contain REs for transmitting CSI-RSand/or DM-RS is greater than four, while that of remaining REs in theother OFDM symbol is less than four, the receiving terminal equipment ofsaid backhaul link control channel information identifies each fourremaining REs forming into one REG in the OFDM symbol with more thanfour said remaining REs; if the sum between the number of the rest ofremaining REs after combination of REG in the OFDM symbol with more thanfour said remaining REs and that of remaining REs in the OFDM symbolwith less than four said remaining REs is greater than four, thereceiving terminal equipment of said backhaul link control channelinformation identifies in said two OFDM symbol one REG composed of eachfour remaining REs which are not occupied by CSI-RS and/or DM-RS, andthe remaining REs that are composed of the rest of remaining resourceparticles that fail to constitute REG; when the number of remaining REsin both of the two adjacent OFDM symbols that contain REs fortransmitting CSI-RS and/or DM-RS is greater than four respectively, thereceiving terminal equipment of said backhaul link control channelinformation identifies each four remaining REs forming into one REG ineach said OFDM symbol respectively; if the number of the rest ofremaining REs after combination of REG in two said OFDM symbols isgreater than four, the receiving terminal equipment of said backhaullink control channel information identifies in said two OFDM symbol oneREG composed of each four remaining REs which are not occupied by CSI-RSand/or DM-RS, and the remaining REs that are composed of the rest ofremaining resource particles that fail to constitute REG; when thenumber of remaining REs in both of the two adjacent OFDM symbols thatcontain REs for transmitting CSI-RS and/or DM-RS is less than fourrespectively while the total number of remaining RE in two said OFDMsymbols is greater than four, the receiving terminal equipment of saidbackhaul link control channel information identifies in said two OFDMsymbol one REG composed of each four remaining REs which are notoccupied by CSI-RS and/or DM-RS, and the remaining REs that are composedof the rest of remaining resource particles that fail to constitute REG.15. The method as claimed in any of claim 11, wherein, receivingterminal equipment of said backhaul link control channel informationabandons receiving backhaul link control channel information through theremaining REs that fail to constitute REG in said OFDM symbol, andreceives backhaul link control channel information through REG orabandons it, specifically as: when identifying several REGs in aphysical resource block, the receiving terminal equipment of backhaullink control channel information can receive backhaul link controlchannel information through one or several REG(s) respectively accordingto the actual situation, and/or abandon such operation.
 16. A receivingterminal equipment for backhaul link control channel information, whichcomprises: identification module, used to identify REG in OFDM symbolthat is in physical resource block and contains REs for transmittingCSI-RS and/or DM-RS; processing module, used to abandon receivingbackhaul link control channel information through remaining REs in saidOFDM symbol that fail to constitute REG, and receive backhaul linkcontrol channel information through REG identified by saididentification module or abandon receiving backhaul link control channelinformation through REG identified by said identification module. 17.The receiving terminal equipment for backhaul link control channelinformation as claimed in claim 16, wherein, said identification moduleidentifies REG in OFDM symbol that is in physical resource block andcontains REs for transmitting CSI-RS and/or DM-RS, further including:said identification module identifies REG in an OFDM symbol that onlycontains REs for transmitting CSI-RS in the physical resource blocks andthat is adjacent to the OFDM symbol not containing RE for transmittingCSI-RS; and/or, said identification module identifies REG in twoadjacent OFDM symbols that contain REs for transmitting CSI-RS and DM-RSin physical resource block.
 18. The receiving terminal equipment forbackhaul link control channel information as claimed in claim 17,wherein, said identification module identifies REG in an OFDM symbolthat only contains REs for transmitting CSI-RS in the physical resourceblocks and that is adjacent to the OFDM symbol not containing RE fortransmitting CSI-RS, specifically as: when a physical resource blockonly comprises the REs for transmitting CSI-RS, and the number ofremaining REs in one OFDM symbol whose adjacent OFDM symbol does notcontain RE for transmitting CSI-RS is greater than four, saididentification module identifies in said OFDM symbol one REG composed ofeach four remaining REs, and the remaining REs that are composed of therest of remaining resource particles that fail to constitute REG; when aphysical resource block only comprises the REs for transmitting CSI-RS,and the number of remaining REs in one OFDM symbol whose adjacent OFDMsymbol does not contain RE for transmitting CSI-RS is less than four,said identification module identifies the remaining REs that arecomposed by all remaining resource particles that fail to constitute REGin said OFDM symbols.
 19. The receiving terminal equipment for backhaullink control channel information as claimed in claim 17, wherein, saididentification module identifies REG in two adjacent OFDM symbols thatcontain REs for transmitting CSI-RS and DM-RS in physical resourceblock, specifically as: when the number of remaining REs in one OFDMsymbol out of two adjacent OFDM symbols that contain REs fortransmitting CSI-RS and/or DM-RS is greater than four, while that ofremaining RE in the other OFDM symbol is less than four, saididentification module identifies each four remaining REs forming intoone REG in the OFDM symbol with more than four said remaining REs; ifthe sum between the number of the rest of remaining REs aftercombination of REG in the OFDM symbol with more than four said remainingREs and that of remaining REs in the OFDM symbol with less than foursaid remaining REs is greater than four, said identification moduleidentifies in said two OFDM symbol one REG composed of each fourremaining REs which are not occupied by CSI-RS and/or DM-RS, and theremaining REs that are composed of the rest of remaining resourceparticles that fail to constitute REG; when the number of remaining REsin both of the two adjacent OFDM symbols that contain REs fortransmitting CSI-RS and/or DM-RS is greater than four respectively, saididentification module identifies each four remaining REs forming intoone REG in each said OFDM symbol respectively; if the number of the restof remaining REs after combination of REG in two said OFDM symbols isgreater than four, said identification module identifies in said twoOFDM symbol one REG composed of each four remaining REs which are notoccupied by CSI-RS and/or DM-RS, and the remaining REs that are composedof the rest of remaining resource particles that fail to constitute REG;when the number of remaining REs in both of the two adjacent OFDMsymbols that contain REs for transmitting CSI-RS and/or DM-RS is lessthan four respectively while the total number of remaining REs in twosaid OFDM symbols is greater than four, said identification moduleidentifies in said two OFDM symbol one REG composed of each fourremaining REs, and the remaining REs that are composed of the rest ofthe remaining resource particles that fail to constitute REG.
 20. Thereceiving terminal equipment for backhaul link control channelinformation as claimed in claim 16, wherein, when said identificationmodule identifies several REGs in a physical resource block, saidprocessing module abandons receiving backhaul link control channelinformation through remaining REs in said OFDM symbol that fail toconstitute REG and receives backhaul link control channel informationthrough one of or several REGs thereof and/or abandons receivingbackhaul link control channel information through one or several REGsthereof.